is it possible to use CUDA for batch rendering with many projects over the command line tool aerender ?
Would a nVidia TESLA GPU significantly increase the performance? Or are only the 570/580 and Quadro GPUs supported?
The GPU matters hardly at all for After Effects. After Effects doesn't use CUDA at all, and primarily uses OpenGL for a low-fidelity preview renderer. Don't waste your time thinking about the GPU for After Effects.
See this video for details: